1. Over the course of the whole 12 days, how many presents were sent in total? 2. How many would have been if the presents continued to be given for 100 days? Justify your answers! | On the first day of Christmas, my true love sent to me A partridge in a pear tree. On the second day of Christmas, my true love sent to me Two turtle doves, And a partridge in a pear tree. On the third day of Christmas, my true love sent to me Three French hens, Two turtle doves, And a partridge in a pear tree. etc. |
4 Comments
Andrey Dyukmedvhiev
11/12/2016 08:54:49 am
1) The 12th Triangular Number 12*13/2 = 78:
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Andrey Dyukmedzhiev
12/12/2016 05:57:14 pm
Sorry, I haven't read carefully the text on the right side of the picture and just added the numbers drawn.
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Stuart White
12/12/2016 10:24:43 am
As the number of presents increases by one, and the previous presents are also added in, we get:
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